Concentration of credit risk (Tables)

9 Months Ended

Mar. 31, 2021

Concentration of credit risks [Abstract]

Schedules of Concentration of Risk, by Risk Factor [Table Text Block]

Domestic and international sales from continuing operations are as follows:

( in thousands)	For the Three Months Ended September 30,
	2021				2020
Domestic	$	1,625	60.7	%	$	1,542	63.9	%
Foreign	1,050		39.3	%	872		36.1	%
Total	$	2,675	100.0	%	$	2,414	100.0	%